Complex energy approaches for calculating Isobaric analogue states

R. ID BETAN; A. T. KRUPA; T. VERTSE

Physical Review C - Nuclear Physics

Año: 2008 vol. 78 p. 44308 - 44308

Parameters of isobaric analog resonance (IAR) are calculated in theframework of the Lane model using different methods. The standardmethod: the direct numerical solution of the coupled channel Lane equations (CC) served as a reference for checking two complex energy methods, namelythe complex energy shell model(CXSM) and the complex scaling (CS) approaches. The IAR parameterscalculated by the CXSM and the CS methods agree with that of the CCresults within 1 keV for all partial waves considered. Although the CXSM and the CS methods have similarities an importantdifference is that theCXSM offers a direct way for studying the configurations of the IAR wave function in contrast to the CS method.